Lansford, L., & Lewis Lansford. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoLansford, Lewis, và Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
Deismireacht MLALansford, Lewis, và Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.